How much was lost in the Hedera hack?

The Hedera hack resulted in $515K in losses on March 10, 2023.

What attack technique was used in the Hedera exploit?

The Hedera exploit utilized Unknown. Understanding this attack vector is critical for smart contract auditors and developers building secure DeFi protocols.

How can developers prevent similar smart contract attacks?

Preventing smart contract hacks requires a combination of secure coding practices, thorough security audits, and understanding common attack vectors like reentrancy, oracle manipulation, and access control flaws. Smart Contract Hacking (SCH) provides hands-on training to help developers and auditors identify and prevent vulnerabilities before deployment.

Hedera Hack

TOTAL LOST $515K

Low Mar 10, 2023 Unknown hedera

Affected Chain hedera Incident surface

Recovered - No recovery reported

All-Time Rank #995 By amount stolen

Protocol Type Chain Target category

Incident Overview

Hedera enables seamless tokenization of real-world and digital assets at scale, offering unmatched performance, security, and compliance for thriving tokenized economies.

Incident Report

Protocol / Project Hedera

Date of Incident March 10, 2023

Affected Chain(s) hedera

Attack Technique Unknown

Classification Protocol Logic

Primary Source View Post-Mortem

Protocol Information

Protocol Type Chain

Official Website hedera.com/

Protocol Twitter/X @hedera

Market Context at Time of Hack

Token Categories

DAG Marketplace Enterprise Solutions Payments DCG Portfolio Hedera Hashgraph Ecosystem Real World Assets Protocols Layer 1

Protocol Links

GitHub Discord Reddit

What the Attacker Needed to Succeed

Understanding the prerequisites for this type of attack helps auditors identify protocols that are most at risk and helps developers build better defenses.

Technical Knowledge Deep understanding of unknown and Solidity and EVM internals

Capital Required Seed capital to cover gas and initial position setup

On-Chain Access Ability to interact with hedera smart contracts and deploy a custom exploit contract

Protocol Analysis Identification of the exploitable vulnerability in Hedera's contract logic - root cause: protocol logic

Execution Speed Precise transaction ordering and timing to exploit the vulnerability within a single atomic block

Obfuscation Plan A strategy to launder and move stolen funds - typically through mixers, cross-chain bridges, or decentralized DEX swaps to resist tracing

What Auditors Should Check

Could this have been caught in audit? Likely — with a thorough Unknown audit checklist and test coverage

If you're auditing a protocol with similar architecture to Hedera, these are the critical security checks that could have prevented this incident (March 2023).

Verify all logic paths related to Unknown are guarded by proper access controls and input validation
Review privileged functions (owner, admin, governance) for potential abuse vectors - centralization risks should be documented and bounded with timelocks or multi-sigs

Master these auditing techniques with hands-on labs and real exploit scenarios in the Smart Contract Hacking course.

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Sources & References

01
Source 1 https://rekt.news/hedera-rekt/

Threat Assessment

Severity Level

LOW

Attack Vector Unknown
Root Cause Protocol Logic
Year 2023

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